leaves enhance insulin sensitivity by improving the absorption of glucose into skeletal muscle. 
lowers blood glucose levels and alleviates insulin resistance by increasing the expression of glucose transporter IV and improving muscular β-oxidation [2
Green Tea: The consumption of green tea has been shown to increase the production and release of CCK (Cholecystokinin), which reduces appetite. CCK is a hormone that is released by the intestines after a meal is consumed. This hormone then tells the body that an adequate amount of food has been consumed thus producing satiety, or fullness.